Region
United States
27
Texas
8
Alaska
7
Guadalupe Mountains National Park
5
Guadalupe Mountains National Park (Tex.)
5
West (U.S.)
5
Amazon River Region
4
California
4
Galapagos Islands
4
Arctic regions
3
Atlantic Coast
3
China
3
Latin America
3
Massachusetts
3
Nevada
3
North Carolina
3
Oceania
3
Washington (State)
3
Atlantic Coast (Brazil)
2
Australia
2
Brazil
2
Connecticut River Valley
2
Europe
2
Green Swamp (Brunswick County and Columbus County)
2
Green Swamp (Brunswick County and Columbus County, N.C.)
2
Henan Sheng
2
Henan Sheng (China)
2
Himalaya Mountains Region
2
Hudson River (N.Y. and N.J.)
2
India
2
Kola Peninsula
2
Kola Peninsula (Russia)
2
Mediterranean Region
2
New York (State)
2
North America
2
North Dakota
2
Northwest, Pacific
2
Potomac River
2
Potomac River Valley
2
Russia (Federation)
2
San Francisco (Calif.)
2
San Francisco Bay Area
2
San Francisco Bay Area (Calif.)
2
Spain
2
Valencia
2
Valencia (Spain)
2
Yellow River
2
Yellow River (China)
2
Adirondack Mountains Region
1
Adirondack Mountains Region (N.Y.)
1
more ...